School-desk



UNITED STATES PATENT OFFICE.

AMOS CHASE, OF NORTH WEARE, NEW HAMPSHIRE, ASSIGNOR TO NATHAN C. PAGE,OF NORTH WEARE, NEW HAMPSHIRE.

SCHOOL-DESK.

Specification of Letters Patent No. 30,020, dated September 11, 1860.

To all whom t may concern:

Be it known that I, AMos CHASE, of North Veare, in the county ofHillsboro and State of New Hampshire, have invented a new and usefulImprovement in School Desks and Seats; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the annexed drawings, making a part of this specification,in which- Figure l is a side sectional View of a desk and seatconstructed according to my invention. Fig. 2 is a detached side view ofthe support of the desk.

Similar letters of reference indicate corresponding parts in the twofigures.

The object of this invention is to obtain adjustable desks and seatswhich may be raised and lowered to suit the size or height of thechildren occupying them. The fixed school desks and seats in present useare a fruitful source of many physiological evils in consequence of notbeing susceptible of being adjusted to suit the size or height ofdifferent children.

The invention consists in a peculiar arrangement of slide for the deskand seat substantially as hereinafter described, whereby the desk andseat may be adjusted to the desired height and retained firmly in properposit-ion and a back permitted to be used with the seat.

In carrying out this invention an essential requisite is a firmness andsteadiness of position. Many different` kinds of seats have been devisedso as to be capable of being adjusted vertically, but so far as I amaware they have all lacked firmness and a requisite degree of stiffnessespecially when adjusted in an elevated position. Any tremor or lack offirmness in school desks and seats would, of course, render them nearlyworthless.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A, represents a school desk which may be of the usual form anddimensions. To the under side of the desk there is a socket B, the frontpart of which extends down and forms a pendent bar C, the lower end ofwhich fits in a socket D, secured to the flooring. This socket D, hasits back part extending upward forming a bar E, which ts into the socketB.

The two bars C, E, when together form the pillar which supports thedesk, and through the bar C, a bolt F, passes, said bolt passing throughan oblong slot a, in the bar C, and having a nut b, on its front end.The sockets B, D, serve as guides, and it will be seen that byunscrewing the nut b, the bar C, and desk may be elevated, and securedat any desired point within the range of its movement by screwing up thenut b.

The ends of the bars C, E, never leave their respective sockets D, B,and the two bars may form a pillar or support of polygonal or other formthat fancy may dictate.

To the upper part of the lower socket D, a front board It", is attached.

Gr represents a seat to the under side of which a cylinder H, isattached. This cylinder H, is fitted within a hollow cylinder I, securedto the liooring, and horizontally through the cylinder a screw c,passes.

In the back part of the cylinder I, a Vertical slot d, is made throughwhich a screw J, passes into cylinder H. The outer part of screw J, hasa head or enlarged portion c, which serves as a step or bearing for thelower end of a prop K, of the back L, of the seat. By relaxing orunscrewing the screw c, the cylinder H, is allowed to work freely in thecylinder I, and the cylinder H, and seat may be retained at any desiredpoint by screwing up the screw c. The prop K, serves as an eflicientsupport to the back part of the seat, and enables the occupant to leanagainst the back L, without racking the seat.

By this arrangement the desk and seat are rendered adjustable verticallyand may be made to suit the heightor size of the occupant of the seat G,and at the same time the desk and seat are rendered perfectly stiff andfirm.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

The arrangement of the desk A, and sliding bar C, with the bar E, boltF, and sockets B, D, as and for the purpose herein shown and described.

AMOS CHASE.

Witnesses:

M. A. HoDGDoN, N. C. PAGE.

